/**
 * @version 1.00
 * @author  焦质晔
 * @update  2014-08-20
 */
var slide = function(){
	this.init.apply(this, arguments)
}
slide.prototype = {
	version: "1.00",
	author: "jzy",
	init: function(options){
		this.boxid = options.slideboxid;
		this.awarr = options.slidearrow || [];
		this.ctrlsid = options.slidectrlsid;
		this.event = options.slideevent.substr(2);
		this.movemode = options.movemode;
		this.autoplay = options.autoplay || false;
		this.curindex = options.pageindex || 0;
		this.callback = options.callback || function() {};
		this.autoplaytime = 5;
		this.state = "ready";
		
		var thistemp = this;
		
		if (!this.boxid) {
			throw new error("slidebox不是正确的对象.(slideboxid = \"" + this.slideboxid + "\")");
			return
		}
		
		this.sbox = pg._$(this.boxid);
		this.sarr = pg.getchildnodes(this.sbox);
		this.swid = pg.width(this.sbox.parentnode);
		this.shei = pg.height(this.sbox.parentnode);
		this.len = this.sarr.length;

		this.setstyle(this.sbox.parentnode, {position: 'relative', overflow: 'hidden'});
		this.setstyle(this.sbox, {position: 'absolute', width: this.swid + 'px', height: this.shei + 'px', left: 0, top: 0, overflow: 'hidden'});
		
		this.otarget = {};

		switch (this.movemode){
			case 'scrollx':
				this.otarget = {_scroll: 'left', _mode: 'width', _size: this.swid, _mnext: {left : - this.swid}, _mprev: {left : 0}};
				break;
			case 'scrolly':
				this.otarget = {_scroll: 'top', _mode: 'height', _size: this.shei, _mnext: {top : - this.shei}, _mprev: {top : 0}};
				break;
			default:
				break;
		}
		
		for (var i = 0;i < this.len;i++){
			this.sarr[i].index = i;
			this.movemode == 'fade' && pg.addclass(this.sarr[i], 'focus_opacity')
		}

		pg.addclass(this.sarr[this.curindex], 'current');

		if (this.awarr.length){
			pg.addevent(pg._$(this.awarr[0]), 'click', function(){
				thistemp.exec('prev')
			});
			pg.addevent(pg._$(this.awarr[1]), 'click', function(){
				thistemp.exec('next')
			});
		};
		
		if (this.ctrlsid){
			this.obtn = pg._$(this.ctrlsid);
			this.obtnarr = [];
			for (var i = 0;i < this.len;i++){
				var oli = pg.dc('li');
				oli.index = i;
				oli.innerhtml = i + 1;
				this.obtnarr.push(oli);
				this.obtn.appendchild(oli);
				if (this.curindex == i) pg.attr(oli, 'class', 'current');
				pg.addevent(oli, this.event, function(){
					thistemp.fncut(this.index)
				});
			}
		}
		
		pg.addevent(this.sbox, "mouseover", function(){
			thistemp.stop()
		});
		
		pg.addevent(this.sbox, "mouseout", function(){
			thistemp.play()
		});
		
		if (this.autoplay) {
			this.play()
		}	
	},
	exec: function(dir){
		if (this.state != 'ready') return;
		var thistemp = this;
		var prev, next = new number();
		this.state = 'stopping';
		
		for (var k = 0;k < this.len;k++){
			if (pg.hasclass(this.sarr[k], 'current')){
				var cur = k
			}
		}
		
		if (dir == 'next'){
			next = this.curindex + 1 > this.len - 1 ? 0 : this.curindex + 1;
			this.curindex = this.curindex >= this.len - 1 ? 0 : this.curindex + 1;
			this.accountpageindex(this.curindex);
			if (this.movemode != 'fade'){
				pg.css(this.sbox, this.otarget._mode, this.otarget._size * 2);
				pg.css(this.sarr[next], this.otarget._scroll, this.otarget._size);
				pg.css(this.sarr[next], 'display', 'block');
				pg.startmove(this.sbox, this.otarget._mnext, pg.move_type.buffer, function(){
					thistemp.resetclass(next);
					pg.css(thistemp.sbox, thistemp.otarget._scroll, 0);
					pg.css(thistemp.sbox, thistemp.otarget._mode, thistemp.otarget._size);
					if (thistemp.callback) thistemp.callback();
					thistemp.state = 'ready'
				});
			} else {
				pg.css(this.sarr[next], 'display', 'block');
				pg.startmove(this.sarr[next], {opacity : 100}, pg.move_type.buffer);
				pg.startmove(this.sarr[cur], {opacity : 0}, pg.move_type.buffer, function(){
					thistemp.resetclass(next);
					if (thistemp.callback) thistemp.callback();
					thistemp.state = 'ready'
				});
			}
		} else {
			prev = this.curindex - 1 < 0 ? this.len - 1 : this.curindex - 1;
			this.curindex = this.curindex <= 0 ? this.len - 1 : this.curindex - 1;
			this.accountpageindex(this.curindex);
			if (this.movemode != 'fade'){
				pg.css(this.sbox, this.otarget._mode, this.otarget._size * 2);
				pg.css(this.sbox, this.otarget._scroll, - this.otarget._size);
				pg.css(this.sarr[prev], this.otarget._scroll, 0);
				pg.css(this.sarr[prev], 'display', 'block');
				pg.css(this.sarr[cur], this.otarget._scroll, this.otarget._size);
				pg.startmove(this.sbox, this.otarget._mprev, pg.move_type.buffer, function(){
					thistemp.resetclass(prev);
					pg.css(thistemp.sbox, thistemp.otarget._mode, thistemp.otarget._size);
					if (thistemp.callback) thistemp.callback();
					thistemp.state = 'ready'
				});
			} else {
				pg.css(this.sarr[prev], 'display', 'block');
				pg.startmove(this.sarr[prev], {opacity : 100}, pg.move_type.buffer);
				pg.startmove(this.sarr[cur], {opacity : 0}, pg.move_type.buffer, function(){
					thistemp.resetclass(prev);
					if (thistemp.callback) thistemp.callback();
					thistemp.state = 'ready'
				});
			}
		}
	},
	accountpageindex: function(index){
		if (!this.ctrlsid) return;
		for (var i = 0;i < this.len;i++) {
			pg.removeclass(this.obtnarr[i], 'current');
		}
		pg.addclass(this.obtnarr[index], 'current');
	},
	resetclass: function(index){
		for (var i = 0;i < this.len;i++){
			pg.removeclass(this.sarr[i], 'current');
			pg.attr(this.sarr[i], 'style', '');
		}
		pg.addclass(this.sarr[index], 'current');
	},
	fncut: function(index){
		if (this.state != 'ready') return;
		for (var i = 0;i < this.obtnarr.length;i++){
			if (pg.hasclass(this.obtnarr[i], 'current')){
				var curindex = i
			}
		}
		if (index > curindex){
			this.curindex = index - 1;
			this.exec('next')
		} else {
			this.curindex = index + 1;
			this.exec('prev')
		}
	},
	play: function(){
		var thistemp = this;
		if (!this.autoplay) return;
		this._timer = setinterval(function(){
			thistemp.exec('next');
		}, this.autoplaytime * 1000)
	},
	stop: function(){
		if (!this.autoplay) return;
		clearinterval(this._timer);
	},
	setstyle: function(obj, json) {
		var attr="";
		for(attr in json) {
			obj.style[attr]=json[attr]
		}
	}
}